package com.zhang.springcloud.service;

import cn.hutool.core.util.IdUtil;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;

import java.util.concurrent.TimeUnit;


//Hystrix服务降级既可以加载客户端，也可以加载服务端
@Service
public class PaymentService {

    public String paymentInfo_OK(Integer id){
        return "线程池："+Thread.currentThread().getName()+" paymentInfo_OK,id: " + id+"\t" +"哈哈~";
    }



    //============服务降级
    @HystrixCommand(fallbackMethod = "paymentInfo_TimeOutHandler",commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds",value = "5000")
    })
    public String paymentInfo_TimeOut(Integer id){
        int timeNum = 3000;
        try {
            TimeUnit.MILLISECONDS.sleep(timeNum);
        }catch (InterruptedException e){
            e.printStackTrace();
        }
        //int num = 10/0;
        return "线程池："+Thread.currentThread().getName()+" id: " + id+"\t" +"O(∩_∩)O哈哈~~   耗时（秒）：";//+timeNum;
    }

    public String paymentInfo_TimeOutHandler(Integer id){
        return "线程池："+Thread.currentThread().getName()+" 系统繁忙或运行出错，请稍后再试,id: " + id+"\t" +"o(╥﹏╥)o~";

    }


     //=========服务熔断

    @HystrixCommand(fallbackMethod = "paymentCircuitBreaker_fallback",commandProperties = {
            @HystrixProperty(name = "circuitBreaker.enabled",value = "true"),   //是否开启断路器
            @HystrixProperty(name = "circuitBreaker.requestVolumeThreshold",value = "10"), //请求次数
            @HystrixProperty(name = "circuitBreaker.sleepWindowInMilliseconds",value = "10000"),//时间窗口期
            @HystrixProperty(name = "circuitBreaker.errorThresholdPercentage",value = "60") //失败率达到多少时跳闸
    })
    public String paymentCircuitBreaker(@PathVariable("id") Integer id){
        if(id < 0){
            throw new RuntimeException("******id 不能为负数");
        }
        String serialNumber = IdUtil.simpleUUID();
        return Thread.currentThread().getName()+"\t"+"调用成功，流水号: " + serialNumber;
    }


    public String paymentCircuitBreaker_fallback(@PathVariable("id") Integer id){
        return "id 不能为负数，请稍后再试，o(╥﹏╥)o id: "+id;
    }


}
